added Scripts/create_deb_packages.sh (#1655)

* added Scripts/create_deb_packages.sh

* better comment

* more cmake options

* rm ignored rdkitversion cmake flag

because it is overwritten by what is found in CMakeLists.txt:
```
set(RDKit_Year "2018")
set(RDKit_Month "05")
```

* this deps list is for Ubuntu

* rm -Wno-dev cmake option

* updated dependencies in comments

Scripts/create_deb_packages.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# create binary *.deb packages
+
+#set -x # DEBUG
+
+mkdir -p build
+cd build
+cmake \
+    -DRDK_INSTALL_INTREE=OFF \
+    -DRDK_BUILD_INCHI_SUPPORT=ON \
+    -DRDK_BUILD_AVALON_SUPPORT=ON \
+    -DRDK_BUILD_PYTHON_WRAPPERS=ON \
+    -DCMAKE_INSTALL_PREFIX=/usr \
+    ../
+nprocs=`getconf _NPROCESSORS_ONLN`
+make -j $nprocs
+cpack -G DEB
+
+# # to install all necessary dependencies on Ubuntu
+#sudo apt install -y \
+#  curl \
+#  wget \
+#  libboost-all-dev \
+#  cmake \
+#  git \
+#  g++ \
+#  libeigen3-dev \
+#  python3 \
+#  libpython3-all-dev \
+#  python3-numpy \
+#  python3-pip \
+#  python3-pil \
+#  python3-six \
+#  python3-pandas
+
+# # to install the freshly built rdkit packages
+# sudo dpkg -i *.deb